Object Not Set To Reference Of An Object (nullReferenceException)
Dec 8, 2010[Code]....
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Object not set to reference of an object (nullReferenceException)
Similar Messages:
System.NullReferenceException: Object Reference Not Set To An Instance Of An Object.
Feb 8, 2010I am getting error after publishing a website. At debug mode it works fine.
Private Sub fill_ddl_Dist(ByVal _query As String)
Dim con As Connection
con = New Connection
TIP: When you are writing your question, there is a button on the tool bar that wraps the [code] tags around your copy/pasted code. Its the button with a '#' on it. More on tags. They're cool. Check'em out.
MVC :: NullReferenceException: Object Reference Not Set To An Instance Of An Object
Dec 17, 2010I am trying to post some information back to the database in this Controller Action. This Action is called when Save button is clicked on the View.
[AcceptVerbs(HttpVerbs.Post)] public ActionResult EditDetail(int id, FormCollection fvals){ Environments env = environmentsRepository.GetEnvironmentDetail(id); UpdateModel(env); environmentsRepository.Save();return RedirectToAction("List", new RouteValueDictionary(new {controller="Environments", action="List", id = 1})); }
When I click on the Save button, I get the following error:
Line 32:
Line 33:
Line 34: <% foreach (var environment in Model) <--Error in this line
Line 35: { %>
Line 36:
[NullReferenceException: Object reference not set to an instance of an object.] ASP.views_environments_list_aspx.__RenderContent2(HtmlTextWriter __w, Control parameterContainer) in e:codeosspWebUIViewsEnvironmentsList.aspx:34
Web Forms :: Exception Details In System NullReferenceException - Object Reference Not Set
Mar 16, 2011i hav e1 drop down list where is is to filter shif code , ddl text field contaoins shift desc and value contains shift code.
when i select particular shift description it has to show all the 7 days shift description on text boxes iam using informix database
i have 1 dropdownlist which contains shiftcode & shift decription. where shift code is datavalue filed and desc is dat text field. ddl is conected to sql datasource.
i am getting this error:
Object reference not set to an instance of an object.
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Source File: C:srcAicWappPersonnelShiftTime.aspx.vb Line: 33 Stack Trace:
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here is my code..
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Web Forms :: Exception Details - System.NullReferenceException / Object Reference Not Set To An Instance
Sep 23, 2010 i have a Problem, i made a ASP.NET Page with VS2010 and now i want to run it on a iis6 (windows server 2003) and i get the message:
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The Source Code of the File is:
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Why do this error only come on IIS6?
DataSource Controls :: Receiving Error - System.NullReferenceException - Object Reference Not Set
Dec 25, 2010I receive the following error in the code below: System.NullReferenceException: Object reference not set to an instance of an object. When I am logged into the page I do not receive the error. My Code:
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub SqlDataSource4_Selecting(ByVal sender As Object, ByVal e As SqlDataSourceCommandEventArgs) Handles SqlDataSource4.Selecting
Dim MemUser As MembershipUser
MemUser = Membership.GetUser()
UserID.Text = MemUser.ProviderUserKey.ToString()
e.Command.Parameters("@UserId").Value = MemUser.ProviderUserKey.ToString()
End Sub
End Class
I read the following online: You are trying to use a reference variable who's value is Nothing/null. When the value is Nothing/null for the reference variable, that means it is not actually holding a reference to an instance of any object that exists on the heap. You either never assigned something to the variable, never created an instance of the value assigned to the variable, or you set the variable equal to Nothing/null manually, or you called a function that set the variableto Nothing/null for you. The following is the Arthur's code example and his suggested fix which I am sure is right:
Private Sub TestString()
Dim a As String
If a.Length = 0 Then
Console.Write("Yes")
End If
End Sub
Web Forms :: Object Reference Not Set To An Instance Of An Object Error When Remove Reference To Site Master Page
Sep 30, 2010in my default.aspx page i have a dropdown List and a textbox with a submit button below that there are 2 listbox... and the dropdown list holds the names of the listbox
my logic here is to select an item from the dropdown list and put some text in the text box and submit the form which will add an item to the listbox selected.. but when i do this i get an error saying Object reference not set to an instance of an object. i tried to figure out the problem and found that when i remove the reference to the Site Master Page it works fine and when i undo and apply my reference back to the Site Master Page i get the same error.
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Web Forms :: Gridview, Paging And Object Reference Not Set; Error - Object Reference Not Set
Jan 21, 2010I am using grid view as mentioned below, it is giving me error "object reference not set", but if comment allowpaging and pagesize lines, it works. let me know whats wrong I am doing?
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Web Forms :: Session Ended - But Server Error/ Object Reference Not Set To An Instance Of Object?
Nov 15, 2010In the VS2005 environment, when I test my session to make sure the page redirects to the main page (itself) if the session is null, it works. There is no error.
The function I use for this is:
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However, when it is in the production environment in IIS 6.0, when the session has timed out, and I then do a postback by doing some slider control, I see the page reload but immediately thereafter, it throws a Server Error exception of : Object reference not set to an instance of object.
Looking at the stack trace, the event occured:
AJAXEnabledWebApplication1._Default.Slider1_TextChanged(Object sender, EventArgs e)
however, why is it that the Slider1_TextChanged event fired even even after during page_load, the page was told to do a response.direct ?? shouldn't the entire page have gone through a full-page refresh life cycle ? why did it continue on to attempt to raise the Slider1_TextChanged event?
DataSource Controls :: Simple Login Form - Object Reference Not Set To An Instance Of An Object?
Apr 20, 2010im tryin to create a login form.
and am receiving the following error:
Object reference not set to an instance of an object
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and heres my aspx page:
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Stored procedure:
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Page.User.Identity.IsAuthenticated Returns Object Reference Not Set To Instance Of Object?
Dec 23, 2010this works fine on my local site but as soon as i upload the site to my live server i get stem.NullReferenceException: Object reference not set to an instance of an object
on the first line of this:
if (!Page.User.Identity.IsAuthenticated)
{
pnlSignIn.Visible = true;
pnlSignOut.Visible = false;
}
Forms Data Controls :: Object Reference Not Set To An Instance Of An Object Repeater Control
Apr 21, 2010can you please help me to brainstorm the possible causes of this error. I've got a paged repeater with localisation bound programitcally to an sqldatasource using a stored proc. I can post code if needs be but it's rather long. I'm looking for typical causes of this error + will make note for future reference!
erver Error in '/WebSite4' Application.
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
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Line 233:Line 234: Repeater1.DataSource = PagedResultsLine 235: Repeater1.DataBind()Line 236: doPaging()Line 237: End Sub
Forms Data Controls :: Get The Value Of The Id Field In Gridview/Object Reference Not Set To An Instance Of An Object
Feb 1, 2010I am trying to get the value of the id field in my gridview but I keep coming up with this error when i do selectedValue or selecteIndex
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
How do I get that id? What I am trying to do is when the user select that link it will delete that information from the database. Here's my code:
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Web Forms :: Error When Using A BasePage Along With A Master Page/ Object Reference Not Set To An Instance Of An Object
Mar 6, 2010I'm new to programming in ASP.NET, but I'm making my way through Wrox's Beginning ASP.NET 3.5 in C# and VB.NET.
I'm at a section where I'm creating a BasePage. I successfully created a BasePage by creating a new class file in my App_Code folder called BasePage.cs with the following code:
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If I run that code everything works out fine. The page loads and all is well. But, if I try to do the same thing to a page that uses my MasterPage.master file, I get the following error:
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Why is that? In the example code from the book (that also uses a MasterPage.master file), everything excutes and runs just fine. But in my test, I get the above error. I've tried comparing my pages to the books included source pages, but I can't find any differences.
Web Forms :: Accessing Control In Usercontrol / Error: Object Reference Not Set To An Instance Of An Object
Apr 19, 2010In the same Code behind file I have:
// This works
Label lblTopNavBarInfo = (Label)Master.FindControl("lblTopNavBarInfo");
lblTopNavBarInfo.Text = "Currently Serving: + FirstName + " " + LastName ;
// This compiles but throws an error in the browser
LinkButton lnkBtnProductsOwned = (LinkButton)LeftNav_CustServ1.FindControl("ProductsOwned"); // The Control is visible
lnkBtnProductsOwned.Enabled = false; // Error: Object reference not set to an instance of an object.
Web Forms :: Unable To Read Web.config File/Object Reference Not Set To An Instance Of An Object
Nov 2, 2010I have a website written in C# that was running fine on one server. We moved it to another server and have a couple issues. I am mainly a VB.NET coder but can do a few things in C#. This is not a project - it is a website and can open it in VS2008 no problem. This is an admin site for the whole website where the user can add customer comments, etc. When logging in, it works fine. I can go to one of the admin pages after logging in and works. If I go to two other different pages, I get this error:
Object reference not set to an instance of an object.
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It turns out this is in the main.master page and it is used by the other pages that load fine. The ApplicationTitle variable is set right in the web.config file and like I said, it shows on the other pages.
My question is why would this code work fine for some pages and not two others? All of these admin pages are under a folder called Admin and the web.config file is in the root folder of the website. Its almost like these two pages cannot see the web.config file in the root folder? Why would that be if thats the case?
State Management :: PollLockedSessionCallback Error After Migrating To 2.0/ Object Reference Not Set To An Instance Of An Object
Aug 19, 2010We have an applicaiton that was converted to the new framework using the wizard in Visual Studio 2008. When we install the applicaiton in production and change the iis settings to use the 2.0 framework we start to see these errors in the event viewer on the web servers. We are using SQL Server Session State and have 3 web servers in a load balancer. Object reference not set to an instance of an object.</Message><StackTrace> at System.Web.SessionState.SessionStateModule.PollLockedSessionCallback...
View 1 RepliesWCF / ASMX :: Server Was Unable To Process Request / Object Reference Not Set To An Instance Of An Object?
Apr 16, 2010I have a webservice, it has few webmethods. when i create a client proxy and invoke the methods to check its response, i am getting this error. Can someone tell me what things can i check to know the cause of this? The error is not saying much hence blocked on this.
View 1 RepliesData Controls :: GridView Row Editing DropDownList / Object Reference Not Set To Instance Of Object
Dec 22, 2013 I am trying to implement the code URL...I have a database table with Integer type.Here is the running code line: Code in GridView:
<asp:TemplateField HeaderText="RegionNavn">
<ItemTemplate>
<%# Eval("RegionNavn")%>
</ItemTemplate>
<EditItemTemplate>
<asp:Label ID="lblRegionNavn" runat="server" Text='<%# Eval("RegionNavn")%>' Visible = "false"></asp:Label>
[code]...
On Edit Click, the DropDownList in the GridView brings the previously selected value.On Update Click, the error is: "System.FormatException: Input string was not in a correct format."
dCmd.Parameters.Add("@KystverketRegionID", SqlDbType.Int).Value = int.Parse(ddKystverketRegionID.SelectedValue);
When I use the following code:
ddlRegionNavn.DataTextField = "RegionNavn";
ddlRegionNavn.DataValueField = "RegionID"; // from RegionNavn to RegionID
On Edit Click, the DropDownList values in the GridView is not firing and the following error shows.Object reference not set to an instance of an object. How to implement the code when having a value of type Int ?
Web Forms :: Error When Converting Session To String / Object Reference Not Set To Instance Of Object
May 7, 2015I am getting object refernce error at line:if (Session["Tax"].ToString() == "9")
protected void Page_Load(object sender, EventArgs e)
{
if (Session["Tax"].ToString() == "9")
{
lblTax.Text = Session["Tax"].ToString();
}
else
{
lblTax.Text = "0";
}
}
Is anything wrong I have done?
Data Controls :: Accessing DropDownList In GridView Row - Object Reference Not Set To Instance Of Object
May 30, 2013I have this part in the Gridview.
<asp:TemplateField HeaderText="Student">
<ItemTemplate>
<asp:DropDownList ID="ddl" OnSelectedIndexChanged="ddl_IndexChanged" runat="server">
</asp:DropDownList>
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After the change, when it is to bind data, I get this Exception message. Why?Object reference not set to an instance of an object.
Web Forms :: Returns Object Reference Not Set To An Instance Of The Object Because Of Empty Dataset
Aug 27, 2010private void FillDetails(string pId, out string Name, out string Address)
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I have method called Filldetails(),This method uses stored procedure to retrieve information for product name and address based on productid passed from productdetails table.I am working on globalization project.We have this product information for US country but there is no product information for germany country.So dataset is empty for germany.As result I am getting error object reference not set to an instance of the object.
Web Forms :: Error When Adding To Listbox / Object Reference Not Set To An Instance Of An Object
Feb 19, 2010I have just recently converted my VB code to C# and now having this error when I try to add an item to my listbox, and the value is coming from the item page. I get the error at this segement:
lstboxCart.Items.Add(cartItem.Display());
My listbox is supposed to add the product's name, quantity, and price onto one row.
Here's what I have so far:
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My guess is that the source of the problem could be in the foreach loop from my cart class, shouldn't I be using that for arrays only? If I need to post any markup code or any other class, let me know.
Receiving Object Reference Not Set To An Instance Of An Object When Binding Child DataGrid?
Mar 12, 2010I am receiving Object reference not set to an instance of an Object when binding Child dataGrid in the ItemCommandEvent of Parent dataGrid.
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Forms Data Controls :: Get Error : Object Reference Not Set To An Instance Of An Object
Dec 2, 2010I have a nested gridview
i get error:Object reference not set to an instance of an object
when i try to get the text in the footer template of the inner gridview when clicking on the linkbutton!!!
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